body {
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.container {
  width: 100%;
  height: 100%;
}

.help {
  position: absolute;
  bottom: 5%;
  left: 50%;
  width: 400px;
  margin-left: -200px;

  color: #eee;
  background-color: rgba(0,0,0,0.25);
  
  padding: 1em;
  
  text-align: center;
  font-family: sans-serif;
  border-radius: 20px;

  pointer-events: none;
}

.help .header {
  margin-bottom: 0.5em;
}

.help.hidden {
  visibility: hidden;
  opacity: 0;
  transition: visibility 0s 2s, opacity 2s linear;
}

.help .tip {
  padding: 1em;
}

.help .tip img {
  vertical-align: middle;
}